82571217208 has 32 divisors (see below), whose sum is σ = 169580854800. Its totient is φ = 37517143552.

The previous prime is 82571217151. The next prime is 82571217217. The reversal of 82571217208 is 80271217528.

It is a super-2 number, since 2×82571217208² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10464010 + ... + 10471897.

Almost surely, 2^82571217208 is an apocalyptic number.

It is an amenable number.

82571217208 is an abundant number, since it is smaller than the sum of its proper divisors (87009637592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82571217208 is a wasteful number, since it uses less digits than its factorization.

82571217208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20935959 (or 20935955 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 43.

The spelling of 82571217208 in words is "eighty-two billion, five hundred seventy-one million, two hundred seventeen thousand, two hundred eight".